• Publications
  • Influence
Eukaryotic plankton diversity in the sunlit ocean
Diversity emerged at all taxonomic levels, both within the groups comprising the ~11,200 cataloged morphospecies of eukaryotic plankton and among twice as many other deep-branching lineages of unappreciated importance in plankton ecology studies. Expand
A common red algal origin of the apicomplexan, dinoflagellate, and heterokont plastids
These findings support a relatively simple path of linear descent for the evolution of photosynthesis in a large proportion of algae and emphasize plastid loss in several lineages (e.g., ciliates, Cryptosporidium, and Phytophthora). Expand
Evolutionary and geographical history of the Leishmania donovani complex with a revision of current taxonomy
A new taxonomy is proposed, in which Leishmania infantum and L.Donovani are the only recognized species of the L. donovani complex, and an evolutionary hypothesis for the origin and dispersal of the species is presented. Expand
Evolution and metabolic significance of the urea cycle in photosynthetic diatoms
It is shown that the exosymbiont-derived ornithine-urea cycle, which is similar to that of metazoans but is absent in green algae and plants, facilitates rapid recovery from prolonged nitrogen limitation and represents a key pathway for anaplerotic carbon fixation into nitrogenous compounds that are essential for diatom growth and for the contribution of diatoms to marine productivity. Expand
Chromerid genomes reveal the evolutionary path from photosynthetic algae to obligate intracellular parasites
Insight is provided into how obligate parasites with diverse life strategies arose from a once free-living phototrophic marine alga, and co-regulated with genes encoding the flagellar apparatus supporting the functional contribution of flagella to the evolution of invasion machinery. Expand
Molecular Phylogeny and Description of the Novel Katablepharid Roombia truncata gen. et sp. nov., and Establishment of the Hacrobia Taxon nov
The monophyly of this group is supported by several different molecular phylogenetic datasets and one shared lateral gene transfer and is formally established as the “Hacrobia,” which is an ancestral to all katablepharids, and readily cultivable. Expand
Phylogenetic relationships of some spirurine nematodes (Nematoda: Chromadorea: Rhabditida: Spirurina) parasitic in fishes inferred from SSU rRNA gene sequences.
The results indicate geographical isolation has not been the cause of speciation in this parasite group and no coevolution with fish hosts is apparent, and the placement of Cucullanidae at the base of the suborder Spirurina is supported. Expand
Evolutionary relationships of Spirurina (Nematoda: Chromadorea: Rhabditida) with special emphasis on dracunculoid nematodes inferred from SSU rRNA gene sequences.
The analyses have shown that Dracunculoidea is a paraphyletic taxon and Anguillicolidae and Gnathostomatidae constitute the basal branch of the suborder Spirurina, and the genera Philometra and Philometroides appear to be paraphylettic. Expand
Large-Scale Phylogenomic Analyses Reveal That Two Enigmatic Protist Lineages, Telonemia and Centroheliozoa, Are Related to Photosynthetic Chromalveolates
It is indicated that telonemids and centrohelids are members of an emerging major group of eukaryotes also comprising cryptomonads and haptophytes, and this group is possibly closely related to the SAR clade comprising stramenopiles (heterokonts), alveolates, and Rhizaria. Expand
The Leishmania donovani complex: genotypes of five metabolic enzymes (ICD, ME, MPI, G6PDH, and FH), new targets for multilocus sequence typing.
Flagellates of the Leishmania donovani complex are causative agents of human cutaneous and visceral leishmaniasis. The complex is comprised of L. donovani, Leishmania infantum and LeishmaniaExpand